✦ Skip Trace NEW Sources Pricing Docs Real Estate API Use Cases vs RentCast vs Mashvisor
Sources Stack Endpoints Pricing Docs Real Estate API vs RentCast vs Mashvisor
Get API Key → justin@proptechusa.ai 1-888-784-3881
POWERED BY PropTechUSA.ai 165+ CF WORKERS SUPABASE · KV EDGE <50MS GLOBALLY 8M+ DATA POINTS · 10 SOURCES JUSTIN ERICKSON
⚡ New — County Assessor Records · 10 Sources · Free Tier

Property data.
Rent data.
One API.

The real estate data layer developers actually want. Rent trends, sale-to-list ratios, vacancy rates, bedroom-level HUD rents, live mortgage rates, and AI investor signals — merged from 10 sources into one clean JSON response. No per-call fees. No enterprise contracts. Ship in an afternoon.

33K+ZIP Codes
<50msEdge Latency
7M+Parcels & Growing
45+Data Points/Call
Live API — Try it now
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propdata-api-worker.sales-fd3.workers.dev/v1/market?zip=55101
// PropData API — Live demo // Fetching market data for 55101...
165+ CF Workers KV Edge Cache Supabase Zillow ZORI Realtor.com Redfin HUD FMR Census ACS FHFA HPI FRED

Ten sources.
One response.
Zero compromise.

PropData aggregates 10 sources — Zillow ZORI, Realtor.com, Redfin, HUD Fair Market Rents, Census ACS, FHFA HPI, FRED macro data, a proprietary Estimate Engine, and County Assessor Records — 7M+ King County WA parcels live, growing to 20+ counties. Owner names, assessed values, last sale prices, skip trace. Flat $49/mo. Zero per-call fees.

SOURCE 01

Fair Market Rents

U.S. Dept. of Housing & Urban Development

The government's official rent benchmark — the same data used to set Section 8 voucher amounts. Every county in America. Studio through 4-bedroom. Ground truth for affordability analysis.

STUDIO1BR2BR3BR4BRCOUNTY-LEVELFREE GOVT DATA
SOURCE 02

Observed Rent Index

Zillow Research

ZORI — Zillow's smoothed median asking rent for all homes and multifamily. The most cited rent trend dataset in real estate. ZIP, metro, state, and national with 10 years of history.

MEDIAN RENTYOYMOMZIP-LEVEL10 YR HISTORY
SOURCE 03

Market Metrics

Realtor.com Research

Monthly listing data: median prices, days on market, active inventory, new listings, price reductions, price per sqft. The pulse of the for-sale market at ZIP level.

DOMPRICE/SQFTINVENTORYPRICE CUTS
SOURCE 04

Market Tracker

Redfin

Sale-to-list ratio, % sold above list, days to pending, months of supply. The sharpest demand signal in public real estate data.

SALE/LIST RATIO% ABOVE LISTDAYS TO PENDING
SOURCE 05

ACS Demographics

US Census Bureau

Vacancy rates, renter %, median income, rent-to-income ratio. Affordability context nobody else includes at this price.

VACANCY RATERENTER %RENT BURDEN
SOURCE 06 — LIVE

FRED Macro Data

Federal Reserve Bank of St. Louis

Mortgage rates, shelter inflation, national vacancy rate, and housing starts. National economic context alongside local market data — no other API at this price point includes this.

MORTGAGE RATESSHELTER CPIHOUSING STARTS
SOURCE 07 — LIVE

House Price Index

FHFA — Federal Housing Finance Agency

Quarterly home price appreciation by state and metro. The definitive government measure of home value change — used by mortgage lenders, Fed economists, and institutional investors.

HPI APPRECIATIONSTATE + METROQUARTERLY
SOURCE 08 — LIVE

Building Permits

US Census Bureau BPS

Monthly new construction by unit type. The forward-looking supply signal — permits today become inventory in 12-18 months. Predicts rent pressure before it shows up in listing data.

SINGLE FAMILYMULTIFAMILYSUPPLY SIGNAL
SOURCE 09 — PROPRIETARY

PropData Estimate Engine

PropTechUSA.ai

Weighted rent estimate model built on owned data. ZORI (40%) + Census ACS (25%) + HUD FMR (20%) + Redfin cap rate (15%). Returns low/mid/high range with confidence score. No third-party dependency. No scraping. Ours.

RENT ESTIMATESBEDROOM-LEVELCONFIDENCE SCORE

RentCast charges per call.
ATTOM charges enterprise.
PropData charges $49.

The only API with rent data, market velocity, and county assessor records — owner names, assessed values, skip trace — all at $49/mo flat. Built by Justin Erickson / PropTechUSA.ai. The data ATTOM charges $2,000/mo for. Free tier, no credit card. 165+ Cloudflare Workers in production.

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const res = await fetch(
 \`${API_BASE}/v1/market
  ?zip=55101\`,
 { headers: {
  'x-api-key': 'YOUR_KEY'
 } }
);
const data = await res.json();
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